ISIL claimed on Friday that a female American hostage had been killed in an air strike in Syria by the US-led coalition.

ISIL claimed on Friday that a female American hostage had been killed in an air strike in Syria by the US-led coalition.

In a statement posted on 'jihadist' websites, ISIL said the woman was buried under rubble after a raid by a Jordanian warplane in Raqa, the self-proclaimed capital of the militant group.

"The plane from the crusader coalition bombed a position outside the city of Raqa after Friday prayers," it said.

"No fighter was wounded, but we can confirm that an American hostage was killed in the strikes."

The statement did not show any pictures of a body and there was no independent confirmation of the claim.

US officials declined to comment.

"I cannot confirm those reports in any way. I'm not going into specifics of Americans held overseas," State Department deputy spokeswoman Marie Harf said.